Otto a



OTTO A. MOSES, OF NEW YORK, A.

VOLTAlC-ARC LAMP.

SPECII ICATIQN forming part of Letters Patent No. 292,841. dated February 5, 1884.

. 7 Application filed April 20, 1853.

T0 aZZ "whom it may concern Be it known that I, OTTO A. Moses, of the city, county, and State of New York, have invented a new and useful Improvement in Yoltaic-Arc Lamps, of which the following is a specification.

In prior applications I have described a regulator for the voltaic are, in which an electro-magnet or solenoid surrounds the movable carbon-carrying tube and a divided core or armature, consisting of a central body surrounded by several wires or springs, is placed within said tube, which is filled with a viscous fluid-such as glyeerinesuch divided core or armature being supported by a rod and spring from above. Below the regulating magnet or solenoid an intensifier surrounds the carbmrcarrying tube. This is so termed because, being magnetically energized, it intensifies the action of the magnet upon the divided core or armature within the tube. Such intensifier is affected by variations in energy of the regulating solenoid or electromagnet, so as to grip the tube and assist in raising it when necessary.

This invention relates to certain improve ments on the regulator thus generally described, my objects being to insure a more efficient clamping action upon the tube, to improve the construction of the divided core or armature, and generally to improve the construction and operation of the apparatus; and said invention consists in the novel devices and combinations of devices employed by me in accomplishing the above objects, as herein after set forth and claimed.

Said invention is illustrated in the accompanying drawing, which is a sectional View of a voltaic-arc regulator embodying the same.

A is the regulating magnet or solenoid, which is placed directly in the circuit with the are. This magnet or solenoid surrounds the movable carbon-carrying tube B, which is filled with glycerine or other suitable viscous liquid, 0. I11 a suitable cage, 1), removably attached to the lamp-frame below the magnet or solenoid, is the intensifier. That shown is the form described in my application Serial No. 75,195, consisting of a number of balls or rollers, a a, of magnetic material strung on a (X0 model.)

wire ring, I), and encircling the tube, each ball having a slight independent movement. These balls being attracted by the magnet and by the divided core or armature within the tube, clamp said tube and assist in raising it when it is desired to separate the carbons.

Above the magnet or solenoid, and resting upon its frame, is a similar intensifier, composed of balls to a. This upper intensifier becomes magnetically energized from the magnet A, and so, also, does the divided core or armature within the tube; hence these two parts attract each other, and as the intensifier cannot move down, being supported by the magnet, the tendency is for the divided core or armature to be drawn up by the mutual attraction, and in this way the upper intensifier assists in lifting the carboircarrying tube.

The divided core or armature within the carbon-carrying tube consists of the body 0, surrounded by the wires or springs (I (Z, and suspended from above by the rod 0. This device is, in several of my prior patents and applications, termed a brush. IIeretofore the body 0 has been made of the same diameter throughout its length, the wires (1 being bent out seas to approach the tube. In the present case, however, I make the body of the tapered form shown, it being smallest at the top and gradually increasing in size to its lower end. The wires (Z are thus brought close to the tube near their ends and clamp the tube only at this point, thus diminishing friction between the wires and tube. As the brush moves down, letting the tube descend, its point of contact leaves the intensifier, and therefore the attraction between brush and intensifier becomes less, allowing the tube to fall more freely; and as the brush rises it approaches nearer to the intensifier, the attraction increases, and a stronger clamping and lifting action results. The tapered form of the brush thus increases the eiiiciency and supported by a spring from above in such manner that it could not readily be detached. In order to allow the ready removal of the divided core or armature from the tube, I connect it in the following manner: One end of the spiral spring f is attached to the inclosing-tube E, which is supported by the lamp-frame, and the other end is held within the block by the set-screw 71 The rod 6 also passes through the block 9 and is held by set-screw a". The rod is thus suspended by the spring and moves upwardly against its tension; but by loosening the set-screws the spring can be detached from the block 9, and the rod and divided core or armature can be readily withdrawn from the tube.

Below the body 0 is attached the disk k, which is preferably of the form shown, though it may be flat. Its edge is beveled or rounded, as shown. This disk serves to keep the brush in the center of the tube, the disk being in contact with the tube, and also by its press ure on the liquid above it assists in the lifting action upon the tube. The cage D,which holds the lower intensifier, a a, is secured removably to a cross-piece of the lamp-frame by means of the pins Z l, which enter slots in the side of the cage. A metal ring or washer, m, is laid loose in the bottom'of the cage, encircling the tube in sufficient proximitythereto to close up the opening in the bottom of the cage, and prevent the admission of dust or moisture. Being loose, it does not interfere with the motion of the tube.

\Vhen the magnet or solenoid A is strongly energized, by reason of the decrease in resistance of the arc, the lower intensifier is upwardly and the upper one downwardly attracted, and both are attracted inwardly toward the tube, while the divided core or armature is attracted upwardly and its springs outwardly against the tube. These oppositelyattracted parts then form togethera magnetic clamp, which contracts upon the tube and decreases in length, and by such contraction and shortening clamps and lifts the tube. hen

the current weakens, the parts of the clamp separate, such clamp expands and lengthens, and the tube is allowed to fall the proper distance.

In my prior patents I have shown intensifiers of forms other than the ring of balls or rollers set forth in the present case. It is evident that I might use two intensifiers of either of these other forms, instead of two of the form herein illustrated, without departing from the invention, as hereinafter claimed. It is also evident that the tapered form of divided core or armature might be used with a single intensifier, instead of with two, as shown and it is to be understood that all patentable features of invention shown or described, but not claimed herein, are reserved for protection by other patents, and have been or will be embodied in other applications for patents.

What I claim is 1. In a voltaic-arc lamp, the combination, with the movable carbon-carrier and the regulating magnet or solenoid, of amagneticclamp consisting of oppositely-attracted parts, and operating to lift said carbonfcarrier by contracting and shortening upon it, substantially as set forth.

2. In a voltaicarc lamp, the combination, with the movable carbon-carrying tube and the divided core or armature within said tube, of two oppositely-attracted intensifiers, sub stantially as set forth.

3. In a voltaic-arc lamp, the divided core or armature having a body tapering from one end to the other, substantially as set forth.

4. In a voltaic arc-lamp, the divided core or armature having a tapered body and straight springs or wires in contact with the carboncarrying tube near their lower ends only, sub stantially as set forth.

5. In a voltaic-arc lamp, the combination, with the divided core or armature within the tube, of the disk attached below said core or armature, substantially as set forth.

6. In a voltaic-arc lamp, the combination, with the cage holding the intensifier, of the loose ring or washer placed therein, substantially as set forth.

This specification signed and witnessed this 6th day of March, 1883.

OTTO A. MOSES.

Vitnesses:

H. W. SEELY, EDWARD H. PYATT. 

